The quickshifter purely makes use of existing hardware except for the shift-sensor which is a small piezo-sensor-insert in the shift lever. The existing hardwa

The quickshifter purely makes use of existing hardware except for the shift-sensor which is a small piezo-sensor-insert in the shift lever. The existing hardware being: - ride-by-wire: ability to open/close the throttle electronically - electronic injection control: ability to decrease/increase fuel injection What the quickshifter feature does: a) shift-up was done by decreasing / stopping fuel injection or stopping ignition: torque decreases and for a split second there's no/little torque between gears and the next gear can be shifted effortlessly b) shift down needs increasing torque (usually due to deceleration torque of the engine when the throttle is closed), so this artificially opens the throttle to reverse this effect and allow shifting The magic is all in the software, and there's big differences in the smoothness between manufactures, and also between model years. This is a pure comfort/performance feature, a quickshifter is not needed at all and you still need the clutch to get going. Edit: very old vehicles need a so called double-clutch / german "Zwischengas" to make up for the missing synchronisation / synchromesh gears. That's what's done in software here.